New Online Impact Structures and Impactites Article

Paul H bristolia at yahoo.com
Fri Feb 11 14:09:12 EST 2005

Dear Fellow Meteorite Fans

There is an interesting online article on impactites
and impact structures in the most recent "The
Sedimentary Record", Volume 3, No. 1 - March
2005 at:

http://www.sepm.org/sedrecord/home.htm

It is "The Sedimentary Record of Meteorite Impacts:
An SEPM Research Conference" (1.9 MB PDF File ),
which can downloaded at;

http://www.sepm.org/sedrecord/sedrecord3.1.pdf

Best Regards,

Paul
Baton Rouge, LA

OT While in Tuscon Look At Your US Quarters - Possibly Valuable

Paul H bristolia at yahoo.com
Wed Feb 9 17:44:35 EST 2005

Dear Friends,

The people, who are currently in Tuscon at its huge
gem and mineral show, should look at the United
State quarters in their change. Some of the
"Wisconsin"
quarters sent to the Southwest United States,
especially the
Tuscon area, have a possibly vaulable error in them.

For the details, go look at:

Flawed quarters turning up in Arizona

Associated Press, Arizona Republic, AZ - Feb 8, 2005
http://www.azcentral.com/business/articles/0208FlawedQuarters08-ON.html

"Some Wisconsin quarters issued last year are
turning out to be worth considerably more than
25 cents. And they are being found in Arizona."

and

"Individual coins with the variations were selling
for $500 to $600, depending on condition, he
said."

Wis. error quarters on sale for $1,099
Chicago Sun-Times, February 9, 2005
http://www.suntimes.com/output/news/cst-nws-coin09.html

Flawed Wisconsin quarters uncovered
By Associated Press
http://www.qctimes.com/internal.php?story_id=1045182&t=Nation+%2F+World&c=26,1045182

Best Regards,

Paul

Using Triangulation to Locate Meteorites

Paul H bristolia at yahoo.com
Wed Jan 26 09:46:15 EST 2005

Dear Fellow Meteorite Fans,

The people on this list might be interested in a class
exercise
on using eyewitnesses to falls to locate meteorites on
the
"T.E.A. Classroom Activities" web page at:

http://tea.rice.edu/tea_classroommaterials.html

The exercise is "Using Triangulation to Locate
Meteorites
from Witnessed Falls" at:

http://tea.rice.edu/activity/caldwell/usingtriangulationtolocatemeteoritesfromwitnessedfalls_main.html

Best Regards,

PAul
Baton Rouge, LA

Correction To "Question about "Uranolithe fosslie"(Meteorite) Article"

Paul H bristolia at yahoo.com
Thu Jan 6 16:19:37 EST 2005

In my previous post, I stated that I was looking for:

""Uranolithe fosslie" Astronomie. vol. 7, p. 58"
(1887)."

The correct year is 1888 and page should be 114. the
correct citation is;

"Uranolithe fosslie" Astronomie. vol. 7, p. 114
(1888).

the article gives L'Astronomie as an alternative
spelling.

Sorry About That

Paul
Baton Rouge, LA

Question about "Uranolithe fosslie" (Meteorite) Article

Paul H bristolia at yahoo.com
Thu Jan 6 16:05:08 EST 2005

I am trying to locate a one-page article. All of the
information, which I have is"

"Uranolithe fosslie" Astronomie. vol. 7, p. 58 (1887).

Can anyone identify the publisher and location of
this journal?

If someone happens to have access to this journal,
I will be more than glad to reimburse you for the
cost of a copy of it.

Yours,

Paul
Baton Rouge, LA

[OT] South African Rock and Mineral Dealer Needed

Paul H bristolia at yahoo.com
Wed Dec 29 01:48:14 EST 2004

Dear Friends,

Is anyone on this list either a dealer in South
African rocks
and minerals; know of a South African dealer in rocks
and
minerals, whom I can contact; or have contacts with
South
African collectors. If so, could you contact me off
list.

I looking for specific rock type from South Africa for
research
purposes.

Direct or indirect participation in the successful
acquistion
of this material will be rewarded, in addition, to the

purchase of rock samples with unique trade material of

interest to list members. For more details, contact me
off
list.

Best Regards,

Paul

Mining Manicouagan impact crater

Mining Maricouagan

Paul H
bristolia at yahoo.com
Sat Dec 25 11:25:32 EST 2004

I found the below note in the otherwise dry
world of financial announcements.

Manicouagan Minerals Inc. announces closing of
its public offering and listing on the TSX
Venture Exchange
http://www.newswire.ca/en/releases/archive/December2004/23/c8616.html

"The Corporation is engaged in the exploration of the
Manicouagan meteorite impact crater in central Quebec.

These efforts have been concentrated on seeking
prospective areas of nickel-copper-platinum group
mineralization. The Corporation believes that the
similarities between the Manicouagan crater and the
Sudbury mining district are of a significant enough
technical merit to warrant an extensive exploration
program. Less than 5% of the crater has been explored
to date and geophysical surveys have identified four
deep magnetotelluric anomalies, which are located
toward the center of the Manicouagan crater. The
Corporation has accumulated rights to claims
totalling in excess of 1,300 square kilometres in
the crater area."

Another news release, of November 2004, which I found
was:

"News release via Canada NewsWire, Toronto
416-863-9350
Attention Business Editors:
Manicouagan Minerals Inc. - Drill Results Provide
First Evidence of Nickel and Copper at Depth at the
Baie du Nord Project in the Manicouagan Crater"

This press release stated that in drill holes they
found nickel
and copper at depth consistent with base-metal rich
sulphide
mineralization, which occurs in surface outcrops
within the
Manicouagan impact crater. According to the press
release,
drilling found "significant" "base-metal values"
within
metagabbro sills intruded into foliated feldspar
hornblende
gneiss country rock.

It sounds someone has taken the idea of exploring for
impact
associated mineral deposits in "virgin" impact craters
quite
seriously. I guess only time will tell whether the
shares in
this company will become collectibles or prove to be
visionary
application of the study impact processes.

It seems like that known commercial base-metal
deposits
associated with impact craters were only determined to

be associated with an impact crater after the mineral
deposits
were found. Is this the first time that someone has
gone to
an impact crater with no known ore deposits and gone
prospecting for them since Barringer’s ill-fated
attempts
at Barringer Crater?

The official paperwork on it can be found at:

http://www.sedar.com/DisplayProfile.do?lang=EN&issuerType=03&issuerNo=00017383
http://www.sedar.com/DisplayCompanyDocuments.do?lang=EN&issuerNo=00017383

Best regards,

Paul
Baton Rouge, LA

Re: Asteroid Gets Initial Elevated Risk Rating, ...(Asteroid 2004 MN4)

Paul H bristolia at yahoo.com
Fri Dec 24 23:5Ron Baalke quoted:

Asteroid gets initial elevated risk
rating, but impact unlikely
By JOHN ANTCZAK, Associated Press
December 23, 2004

...text deleted...

Asteroid 2004 MN4, believed to be about 1,300 feet
long, potentially could impact Earth in 2029, based
on a limited number of initial sightings, said
Donald Yeomans, manager of the Near Earth Object
Program at NASA's Jet Propulsion Laboratory in
Pasadena."

I went to http://www.lpl.arizona.edu/impacteffects/ ,
and did some calculations.

Assuming an average projectile velocity of 17 km/s,
and 45 degree entry angle, the result for the impact
of a dense rock object of this size in sedimentary
rock is:

"Transient Crater Diameter: 4.95 km = 3.07 miles
Transient Crater Depth: 1.75 km = 1.09 miles

Final Crater Diameter: 6.13 km = 3.8 miles
Final Crater Depth: 0.511 km = 0.317 miles"

In case of an iron projectile, in sedimentary rock,
the result is:

"Transient Crater Diameter: 7.08 km = 4.4 miles
Transient Crater Depth: 2.5 km = 1.56 miles

Final Crater Diameter: 9.19 km = 5.71 miles
Final Crater Depth: 0.577 km = 0.358 miles"

If this hits land, someone will definitely have a bad
day and one hell of tourist attraction afterward.

Given its small "footprint", if the rock could be
directed to a specific piece of property, I image,
a lot of states could find a 80 square area they
would sacrifice as ground zero for its landing given
the unlimited tourist potential such a crater would
have.

Is there any way to figure out what sort of tsunami
a rock this size would cause?

Best Regards,

Paul
Baton Rouge, LA
4:09 EST 2004

Meteorite finds per state? (In Area Per Meteorite Found)

Paul H bristolia at yahoo.com
Sat Dec 11 21:39:23 EST 2004

In
http://six.pairlist.net/pipermail/meteorite-list/2004-December/147213.html
,
Frank Prochaska wrote:


>The size of the state (country, county, continent,

>etc.) is only one factor in how many meteorites

>are likely to be found there. Other factors

>include geography (flat, mountains), climate (dry,

>wet), land use (forest, farming), population (a

>few people per square mile, high population

>density), etc. These differences will also

>contribute to the ratios of falls to finds, etc.

>Below is a quick count from the latest Catalog

>of Meteorites (5th ed.). This data is about 5

>years old now, but is handy.


I found a listing of the area of each state in
"Land and Water Area of States, 2000 (in square
miles)" at:

http://www.infoplease.com/ipa/A0108355.html
http://www.factmonster.com/ipka/A0108355.html

Using the figures from XXX's post and the "total
land area present within each state, I get the
below number of meteorites per square mile for
each state. The order in which data is listed
is State; number of meteorites; (rank in total
area of state); land area in square miles;
(area in square miles per meteorite found).

Alabama 17 (30) 50,744 (2,985)
Alaska 3 (1) 571,951 (190,650)
Arizona 35 (6) 113,635 (3,247)
Arkansas 14 (29) 52,068 (3,719)
California 45 (3) 155,959 (3,464)

Colorado 73 (8) 103,717 (1,421)
Connecticut 4 (48) 4,845 (1,212)
Florida 4 (22) 53,927 (13,481)
Georgia 22 (24) 57,906 (2,632)
Hawaii 2 (43) 6,422 (3,211)

Idaho 6 (14) 82,747 (13,791)
Illinois 7 (25) 55,584 (7,940)
Indiana 12 (38) 35,866 (2,989)
Iowa 7 (26) 55,869 (7,981)
Kansas 133 (15) 81,814 (615)

Kentucky 26 (37) 39,728 (1,528)
Maine 5 (39) 30,861 (6,172)
Maryland 4 (42) 9,773 (2,443)
Massachusetts 1 (44) 7,840 (7,840)
Michigan 9 (11) 56,804 (6,311)

Minnesota 8 (12) 79,610 (9,951)
Mississippi 3 (32) 46,906 (15,635)
Missouri 20 (21) 68,886 (3,444)
Montana 5 (4) 145,552 (29,110)
Nebraska 46 (16) 76,872 (1,671)

Nevada 8 (7) 109,825 (13,728)
New Jersey 1 (47) 7,417 (7,417)
New Mexico 203 (5) 121,355 (598)
New York 11 (27) 47,213 (4,292)
North Carolina 29 (28) 48,710 (1,680)

North Dakota 10 (19) 68,976 (6,898)
Ohio 11 (34) 40,948 (3,722)
Oklahoma 37 (20) 68,667 (1,856)
Oregon 4 (9) 95,997 (23,999)
Pennsylvania 8 (33) 44,817 (5,602)

South Carolina 6 (40) 30,109 (5,018)
South Dakota 13 (17) 75,884 (5,837)
Tennessee 25 (36) 41,217 (1,649)
Texas 278 (2) 261,797 (942)
Utah 15 (13) 82,143 (5,476)

Virginia 12 (35) 39,594 (3,299)
Washington 6 (18) 66,544 (11,090)
West Virginia 3 (41) 24,078 (8,026)
Wisconsin 12 (23) 54,310 (4,526)
Wyoming 12 (10) 97,100 (8,091)

United States 1214 (n/a) 3,537,438 (2,913)

In 1990, there were three states with less
than 1,000 square miles per found meteorite.
They are New Mexico, Kansas, and Texas.

The states with less than 2,000 square miles
per found meteorite in 1990 were Connecticut,
Colorado, Kentucky, Tennessee, Nebraska, North
Carolina, and Oklahoma.


>This is supposed to total 1214 meteorites,

>though I could have missed one or two between

>the states. More have been found since 1999

>of course, particularly in the desert

>southwest.


This is true. Two have been found in
Louisiana, which now makes Louisiana entry
to be:

Louisiana 2 (31) 43,562 (21,781)

If there are now 13 known meteorites from
Wyoming then, it is now:

Wyoming 13 (10) 97,100 (7,469)

In
http://six.pairlist.net/pipermail/meteorite-list/2004-December/147215.html
,
Frank Prochaska also wrote:


>Dave is absolutely right! Look at the numbers

>for Kansas and Nebraska and then compare Iowa,


Kansas - 615 square miles per found meteorite
Nebraska - 1,671 square miles per found meteorite
Iowa - 7,981 square miles per found meteorite

Best Regards,

Paul
Baton Rouge, LA

An Opportunity For Public Service, Profit, and Publicity

Paul H bristolia at yahoo.com
Sun Nov 28 20:10:52 EST 2004

While looking around on the Internet, I
found an opportunitye for the meteorite
community to do a public service and, at
the same time possibly profit for their
contributions.

This ooportunity exists at the "Earth
Science World ImageBank" at:

http://www.earthscienceworld.org/imagebank/

"The Earth Science World ImageBank is a
service provided by the American Geological
Institute (AGI). This ImageBank is designed
to provide quality geoscience images to the
public, educators, and the geoscience
community."

First, the meteorite community could do a
public service by submitting representative
pictures of meteorites, tektites, impactites,
impact craters, meteorite thin sections,
and anything else related to meteorites. As
far as I found this database has only one
picture of a meteorite and no images of
tektites. It would certainly would be a
public service to contribute pictures of
meteorites and related items, which can be
used for educational purposes. I am using
the word "contribute" because the person
submitting the pictures still retains
copyright on it and can still require a
fee for any commercial use.

It would be a public service if a collection
of meteorite photographs could be submitted
to this web site that included an example
of each different type of meteorite and a
selection of pictures of historically
important falls. Also, pictures of craters,
meteorites as they are found in the field,
impactites, shocked belenmites, shocked
quartz, etc. would be an important
contribution.

Second, one feature of the image data bank
is that a person can permit the free use
of their images for specific educational
purposes and, yet, require people, who want
to use an image for commercial purposes,
pay them a set fee for each use of one of
their images. Thus, not only can a person
perform a public service by providing
images of meteorites, impact craters,
impactites, tektites, thin sections, and
so forth, they also can profit from an
image in the database, if someone wants
to use it for commercial purposes.

Finally, the people on this list should
note that the name of the person or company
hdoling teh copyright is displayed in the
database. This gives them some free publicity.
Also, if an image is used for educational
purposes, the database requests that the
proper credit be given to it. Again, the
contributors will get some more free
publicity whenever their image is used.

For details of how to contribute, go to:

http://www.earthscienceworld.org/imagebank/submit/index.html

"The Earth Science World ImageBank is
always looking to collect more high-
quality geoscience images for this
growing collection. The primary mission
of the ESWIB is to provide these images
to educators, the geoscience community,
and the public for non-commercial use.
Your contribution and assistance in
helping us develop this lasting resource
will not only benefit the scientific
community, but also help to enhance
Earth System education."

Best Regards,

Paul
Baton Rouge, LA

Alleged Picture of "Meteorite Photographed Hitting Earth"

Paul H bristolia at yahoo.com
Wed Nov 24 20:29:28 EST 2004

In the thread "Meteorite Photographed Hitting The
Earth in Australia?" at:
http://six.pairlist.net/pipermail/meteorite-list/2004-November/146190.html

Mike Groetz asked:


>Good Afternoon- If someone finds a link to

>the photo - would you please post it?


For whatever a person might think it is worth, the
picture can found at:

Meteorite 'photographed' hitting Earth
By Nigel Adlam, news.com.au, November 24, 2004
http://www.news.com.au/common/story_page/0,4057,11483286%255E13762,00.html

http://www.news.com.au/common/imagedata/0,3600,398650,00.jpg

Yours,

Paul
Baton Rouge, LA

My Eyes Are Glazing Over- Need "Scorecard"

Paul H bristolia at yahoo.com
Mon Nov 22 10:26:20 EST 2004

As someone, who is trying to follow this discussion,
my eyes are starting glaze over with NWA 1110 this;
NWA 2223 that; NWA 3133 is mine; NWA 3133 is not
yours; my NWA 1906 is real; your NWA 1906 is fake;
may the real NWA 788, NWA 787, or NWA 482,
please stand up. It is hard to search back through
the innumerable posts, given the lack of a search
engine specifically for the archives, to find out the
details behind each specific number is being talked
about.

At some point, it seems someone needs to provide
a "scorecard" of some sort, if it doesn't already
exist, about what each of these "players" (meteorites)

in the number game are about. It would help the soft
core, uninitiated lurkers better understand what is
the significance of NWA XXXX versus either
NWA YYYY or NWA YYXX.

As the posts go back and forth about these numbers,
I think of a song to the tune of "This Land is Your
Land" that starts out as "NWA 1110 is My number,
NWA 1110 is not your number from Uranus to Mercury…"
appearing at some point.

Yours,

Paul
Baton Rouge, LA

New Google Search Engine For Scholars

Paul H bristolia at yahoo.com
Fri Nov 19 10:20:49 EST 2004

There is a new Google Search Engine called "Google
Scholar Beta". An article about is:

Google Adds Search Site for Scholars
TechNewsWorld, November 19, 2004.
http://www.technewsworld.com/story/38289.html

It is suppose to help people find scholarly research on
Internet. The URL for this new search engine is:

http://scholar.google.com/


Best Regards,

Paul

Crater question???

Paul H bristolia at yahoo.com
Tue Nov 9 23:05:43 EST 2004

Tom AKA James Knudson wrote;


>Hello List, It seems that every meteorite made

>crater was first thought to be volcanic,

>including the craters on the moon. We all know

>what Barringer had to go through to prove meteor

>crater was in fact a meteor made crater. If you

>compare the crater pictured in this link with the

>craters on page 152 in your rocks from space

>book, they look quite a bit a like. I am wondering

>if anyone ever searched for evidence of this crater

>being meteoric as apposed to volcanic? It would

>make a fine dinosaur killer!



>http://goafrica.about.com/library/gallery/afar/tanzania/blgallery-afar-tanzania1.htm


Geologists have studied the Ngorongoro Crater. It is a

caldera, a crater of volcanic origin. It is only 2.4
million years old.

Some publications about it are:

Gromme, C. S., Reilly, T. A., Mussett, A. E., and Hay,

R. L., 1971, Palaeomagnetism and potassium-argon ages
of volcanic rocks of Ngorongoro Caldera, Tanzania.
Geophysical Journal of the Royal Astronomical Society.

vol. 22, no. 1, pp. 101-115.

Searle, R. C., 1972, A Gravity Survey of Ngorongoro
Caldera, Tanzania. Bulletin Volcanologique. vol. 35,
no. 2, pp. 350-357.

Walter, R. C., Manega, P. C., Farmer, G. L., and Hart,

W. K., 1990, Geochemical and temporal constraints on
magma genesis of the Ngorongoro volcanic highland,
Tanzania. Seventh international conference on
Geochronology, cosmochronology and isotope geology;
abstracts volume. Abstracts - Geological Society of
Australia. voll. 27, pp. 108.

What I would like to know, is what ever came of the
huge, crater-like feature found by seismic surveys
buried beneath the continental shelf of Columbia.
Before the Chixulub Crater was recognized, a number
of people thought that it might be the site of a
Cretaceous-Tertiary boundary impact.

Best Regards,

Paul
Baton Rouge, LA

Question about Comets, Shock Waves, and Craters

Paul H bristolia at yahoo.com
Tue Oct 19 15:28:53 EDT 2004

I have come across an idea with people,
while engaged in the discussion of geology,
which claims that when a comet disintegrates,
it can produce some type of "shock wave" that
can impact the ground in a way as to produce
a crater. Although the person will claim that
this is scientifically possible, he or she can't
produce a detailed physical model about
how this actually happens.

Has anyone published any type of physical
model about how the disintegration /
explosion / aerial detonation of a comet
can produce "shock waves" / "jets" capable
of producing craters? Is there any reality
to this idea? Or is this all techno babble
of the type that a person hears in "Star
Trek" and other science fiction, used to
justify scientifically impossible plot devices?


Best Regards,

Paul
Baton Rouge, LA

Tandem Meteorites and Superimposed Craters- Fact or Fiction?

Paul H bristolia at yahoo.com
Tue Oct 19 15:24:09 EDT 2004

Occasionally. I have seen people speculate
about what are called "tandem meteorites".
As defined by these people, these are
meteorites that follow right behind each
other, and when they impact on Earth,
they create craters within craters. Is there
any documented example of a meteorite
following a meteorite impacting in such
a way to create superimposed craters
within craters? What about producing
a smaller crater within a larger crater
being produced this way?

Is this idea just someone's vivid imagination?

Best Regards,

Paul
Baton Rouge, LA

New Tektite Paper in Geochimica et Cosmochimica Acta

Paul H
Thu Sep 30 14:51:08 EDT 2004

A new paper about tektites was published in the
October 1st, Geochimica et Cosmochimica Acta. It is:

Glass, B. P., Huber, H., and Koeberl,C., 2004,
Geochemistry of Cenozoic microtektites and
clinopyroxene-bearing spherules. Geochimica
et Cosmochimica Acta. vol. 68, no. 19,
pp. 3807-4021.

Best regards,

Paul
Baton Rouge, LA

1864: fiction or fact? help! - Crater Estimator Paul H bristolia at yahoo.com

1864: fiction or fact? help! - Crater Estimator

Paul H bristolia at yahoo.com
Tue Sep 21 15:00:31 EDT 2004

Chris aubeck wrote:


>As I wish to present this story as a stage in the

>development of meteorite-related myths and

>misidentifications through history, as part of a

>report with wholly educational aims, it would be

>interesting to know whether a scientist working in

the

>mid-19th century would have spotted this fake

>immediately, and how.

>

>Also, how big would the crater of such a large

>meteorite be? Is there a way to estimate it?


Go look at "Earth Impact Effects Program" by
Robert Marcus, H. Jay Melosh, and Gareth Collins at:

http://www.lpl.arizona.edu/impacteffects/

Yours,

Paul
Baton Rouge, LA

Use of Meteorites in the Search for Extraterrestrial Life Reviewed

Paul H bristolia at yahoo.com
Fri Sep 17 16:11:30 EDT 2004

The use of meteorites in the search for
extraterrestrial
life is reviewed in:

van Loon, A. J., in press, The needless search
for extraterrestrial fossils on Earth.
Earth-Science Reviews
Corrected Proof ,Available online 26 August 2004

The abstract can be found by going to:

http://www.sciencedirect.com/science/journal/00128252

and clicking the "Article in Press" link.

According to the abstract, the author argues that
using meteorite to detect extraterrestrial life
most likely is a waste of time.

(NOTE: I am just paraphrasing what is said in the
abstract. His opinions, in way reflect my views.
If you have any complaints about what is said in
the abstract, direct them to the author, not me.)

Yours,

Paul
Baton Rouge, LA

Review of Pseudotachylites Published in Earth-Science Reviews

Paul H bristolia at yahoo.com
Fri Sep 17 16:09:17 EDT 2004

Their a new review paper on the emplacement of
breccias in impact craters. It is:

Dressler, B. O., and Reimold, W. U., 2004, Order
or chaos? Origin and mode of emplacement of
breccias in floors of large impact structures.
Earth-Science Reviews. vol. 67, no. 1-2,
pp. 1-54. (September 2004)

http://www.sciencedirect.com/science/journal/00128252

This paper provides a detailed review of the
origin of pseudotachylites (sensu largo), i.e.
authigenic monomict and polymict clastic-matrix
breccias, so-called footwall breccias, and
impact melt breccias".

Yours,

Paul
Baton Rouge, LA